Global Patent Index - EP 1266683 A1

EP 1266683 A1 2002-12-18 - Gel particle for washing separation membrane modules, manufacturing method thereof and washing method using the same

Title (en)

Gel particle for washing separation membrane modules, manufacturing method thereof and washing method using the same

Title (de)

Gelteilchen zur Reinigung von Membrantrennmodulen, Verfahren zu deren Herstellung und Reinugungsverfahren unter Verwendung derselben

Title (fr)

Particule de gel pour nettoyer des modules de séparation à membranes, procédé pour sa fabrication et méthode de nettoyage utilisant celle-ci

Publication

EP 1266683 A1 (EN)

Application

EP 02012789 A

Priority

JP 2001176840 A

Abstract (en)

A washing method for a separation membrane module which comprises adding a gel particle equivalent to 3 to 40 % of the internal capacity of a membrane module into a liquid being treated and suspending it therein, removing and washing built-up materials on the membrane through contacting the gel particle to the membrane and the internal surface of the module, thereby resulting in preventing the membrane from being obstructed and increasing the permeation pressure thereof. The gel particle comprises an organic polymeric compound , which is gelled by absorbing water, with a specific gravity in water from 0.9 to 1.25, a volume swelling ratio in water from 150 % to 4000% and a compressive yield stress in water from 2.0 MPa to 10.0 MPa thereof. As the gel particle, a thermoplastic polyethylene glycol gel, a thermoplastic polyurethane gel and the like are illustrated. The gel particle is manufactured by a melt extrusion molding method. <IMAGE>

IPC 1-7 (main, further and additional classification)

B01D 65/08; B01D 65/04; C09K 17/30

IPC 8 full level (invention and additional information)

B01D 61/04 (2006.01); B01D 61/10 (2006.01); B01D 61/16 (2006.01); B01D 61/20 (2006.01); B01D 61/36 (2006.01); B01D 61/52 (2006.01); B01D 65/04 (2006.01); B01J 2/20 (2006.01); C02F 1/44 (2006.01); C08G 18/32 (2006.01); C08G 18/48 (2006.01)

CPC (invention and additional information)

B01D 65/02 (2013.01); B01D 61/025 (2013.01); B01D 61/04 (2013.01); B01D 61/145 (2013.01); B01D 61/16 (2013.01); C08G 18/4833 (2013.01); B01D 2311/04 (2013.01); B01D 2321/2091 (2013.01); C08G 2210/00 (2013.01); Y02A 20/131 (2018.01)

Combination set (CPC)

B01D 2311/04 + B01D 2311/2626 + B01D 2311/2642

Citation (search report)

  • [PX] EP 1195396 A1 20020410 - KANSAI PAINT CO LTD [JP], et al
  • [X] US 5932200 A 19990803 - REICH MURRAY H [US], et al
  • [A] DATABASE WPI Section Ch Week 198106, Derwent World Patents Index; Class A88, AN 1981-08856D, XP002211236
  • [A] DATABASE WPI Section Ch Week 198449, Derwent World Patents Index; Class A35, AN 1984-304108, XP002211237

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

EPO simple patent family

EP 1266683 A1 20021218; JP 2002361053 A 20021217; JP 5025857 B2 20120912; US 2003004084 A1 20030102

INPADOC legal status


2004-06-30 [18W] APPLICATION WITHDRAWN

- Effective date: 20040510

2003-09-10 [AKX] PAYMENT OF DESIGNATION FEES

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

2003-06-18 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20030416

2002-12-18 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

2002-12-18 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Free text: AL;LT;LV;MK;RO;SI